Press



' March 18, 1947-. E, G, Loom 2,417,697

PRESS Filed March 29, 1944 2 Sheets-Sheet l w 2 m A A Z .w M u x E.0./ mI 5 6 f 1 I I 1.622. m 7% 5 m m 3 m H my Patented Mar. 18, 1947 UNlTEDSTATES. PA'ILENT OFFICE PRESS Evarts G. Loomis, Newark, N. J.

Application March 29, 1944, Serial No. 528,555

2 Claims. 1

This invention relates to hydraulic or power press frames, and theprimary object of the invention is to provid means by which the two endsof the press, between which a ram, screw, toggle, or other means exertspressure, may be securely held in fixed relation between tie bars, whichmay be vertical, horizontal or at an angle, to more eifectively resistthe pressure applied between them.

In most presses of present day construction, the head of the press,against which the pressure is exerted, is usually held by a number ofvertically or horizontally disposed rods provided with shoulders bywhich the head is held, and against which the head is clamped by meansof nuts adjustably received upon threaded ends on the rods. The repeatedpressure and relief against the head eventually loosens one or more ofthe nuts, causing play or looseness, and finally results in a rodcracking and requiring replacement, which, in th construction abovedescribed, requires dismantling of a considerable number of parts of thepress and the re-assernbly thereof.

The present invention therefore contemplates the provision of means bywhich the head and pressure-applying support, or either or both of theseor corresponding elements of the press, may be effectively held inrelative position to withstand the pressure and often the vibrationimposed upon them during the normal use of the press. The inventioncontemplates the provision of means by which the strains imposed uponthese parts will be distributed uniformly over a considerable area,thereby lessening the strain at a particular point and greatlyminimizing the possibility of breakage.

Another feature of the invention resides in supporting the head andpressure-application portions between vertical or horizontal tie bars ofrectangular or channel shape in cross-section, and providing a face. ofthe cross web of each of these tie bars with teeth or serrations tointerfit with those on the two end pieces of the press frame; in meansby which the head and pressure member may be adjusted to regulate thedistance of compressing movement by the ram; in means by which the tiebars may be employed for the guidance and support of the platens in amultiplaten press, and in numerous other features to be more fullypointed out hereafter.

In the accompanying drawings, wherein several embodiments of theinvention are shown: Fig. 1 is a front view of a press constructed inaccordance with one embodiment of the invention;

Fig. 2 is a front view, showing the interengaging teeth on a head andtie bar;

' Fig. 3 is an end viewof the press.

Fig. 4 is a side view, showing and end of a tie bar attached to the headof a press.

Fig. 5 is a view to show a section of an end of a slotted, serrated tiebar, as bolted to the surface of a head;

Fig. 6 is an end view, and Fig. 6a 'a side view of another means forclamping a tie bar to a cross member or head in which there is nodrilling or slotting of the tie bar;

Fig. 7 is a front view of a press of modified construction, showingplaten-supporting means;

Fig. 8 is a side view of one of the stanchions and parts of the'head andplatens ofa vertical press;

Fig. 9 is a front view, with parts in section, of one of the stanchions,a part ofthe head and parts of the platens and the supporting meanstherefor;

Fig. 10'is a sectional view through one of the stanchions and thep1aten-$upporting means; and

Fig. 11 shows one of the platen lugs.

With reference to the structure shown in Figs. 1 to 3, inclusive, lindicates the base or bottom of a vertical press of this type from whichrises a hydraulically operated ram 2, adapted to exert pressure on anyarticle or element interposed between it and the head 3 of the press. Itis therefore apparent that the head 3, receiving the pressure of the ram2, must be firmly anchored in the supports, consisting of two, three,four or sometimes more uprights or stanchions 4.

The head 3, which may b of suitable shape and construction, is providedon-its side faces with a plurality of teeth 5, the shape of which ismost clearly seen in Fig. 2. It will be therein seen that the teeth, ofserrated or saw-tooth" form, are all of substantially the same pitch anddepth, and that each tooth is provided with a rectangularly disposedsurface 6, or else slightly angularly undercut, as shown at a in Fig. 5.Provided on the face of each of the stanchions 4 at the upper endthereof, is a set of teeth 1 complementary to those shown at 5, and thusarranged to mesh or interfit with the teeth 5 on the head of the press.It will be noted that the teeth 1 0n the stanchion are directedoppositely to the teeth 5, so that the teeth 1 on the stanchions eachhave a shoulder 8 under which the horizontal surface 6 of each of theteeth 5 is located, and the pressure imposed against. the head by theram is distributed over the teeth.

, beam type of stanchion or .tie bar.

It will be also observed that with the bolt holes in the stanchionshaving clearance, and the meshed teeth being slightly spaced, as at 9,this spacing permits, with the angular surfaces, the take-up of any playin fitting, or at any time,

.by tightening of the bolts lllb or cap screws Ill.

as just described may also be utilized for the securement of the base Ibetween the stanchions, except that in the case of the base, the teethare reversed to resist downward stress as distinguished from theresistance of upward stress, as in the case of the head. It will benoted from Fig. 1 that the lower portion of each stanchion has its faceprovided with the teeth II in engagement with the teeth l2 on the base,as explained in respect to the head, except that the teeth on the baseand bottom portion of the stanchions extend oppositely to those on thehead and top part of the stanchions, as will be clearly apparent fromFig. l.

In Figs. 4 and 5 is shown an embodiment wherein the interfitting teeth 5and I are 01' finer pitch than-those shown in Fig. 1, and, in addition,.the teeth are undercut in the manner disclosed at a in Fig. 5. Theutilization of fine teeth results in certain definite advantages, sinceit uniformly distributes the stress between the two elements on thegreater number of teeth in engagement; moreover, it reduces the leveragestrain onthe metal of the teeth owing to the teeth being shallower; italso allows greater tensile strength and rigidity to the stanchions withgiven over-all sectional dimensions.

-When an increased number of fine teeth are employed, as abovedescribed, in respect to the structure of Figs. 4 and 5, the adjustmentof the head or press element 3 may be facilitated by the employment ofthe elongated slots 80 in the cross web 2'! of thechannel-bar orrectangular With this arrangement, the bolts I0, extending throughclamping blocks El, thread into the head 3 and permit easy raising andlowering of it as well as precise placement.

In Figs. 6 and 6a, a modification of the bolting means is shown, whereindrilling or slotting of the tie bars or stanchions is avoided by meansof the cross bars 62 which bridge the side flanges of the tie bar orstanchion. The bolts 21 extending through the bars 62 and threaded intothe head 3 hold the teeth 5 and l in intermesh.

In Figs. '7 to 11, inclusive, is shown another embodiment of theinvention, including a novel platen supporting and guiding means. Inthis embodiment of the invention, the tie bars, shown at 25, eachconsist of a channel beam, or other rectangular beam, preferablysubstantially U- shape in cross section, such as shown in Figs. 4 to Sc,inclusive. Each beam thus has two parallel side flanges '26 integrallyconnected by the cross web 21. The face of the cross web of each tie baris formed with a number of saw-tooth serrations l, and the head of thepress is provided with the teeth 5 which interfit with those shown at Iin the manner described in respect to the structure of Figs. 1 to 3. Itwill be noted that the teeth I on each of the tie bars 25 extends for aconsiderable distance inwardly 'from the top ofthe tie bar, so that thehead can be relocated at the desired position by engaging the 4 teeth onthe head with a selected number of the teeth I on the tie bar. The heador cross member is secured to the tie bars by means of the screws orbolts 28, and to permit positioning of the head at various points alongthe length of the stanchions, the stanchions are provided with thespaced screw holes 29 to receive the screws or bolts 28 and hold thehead or cross member at any selected position onthe tie bars. To allowcloser and varied adjustment, instead of a plurality of holes 29, asingle elongated slot, or a plurality of slots extending in the tie barcross web 21, may be employed to permit the passage of the bolts orscrews 28, as shown in Figs. 4 and 5.

To protect and cover the exposed and unused portions of the teeth I onthe tie bars, a cover member or guard 30 may be provided, the sameextending over the unused teeth and being secured thereto by screws, oneof which is shown at 31.

As shown in Figs. 7 to 11, inclusive, on a vertical press, thechannelled stanchions or any other rectangular form, as shown in Figs.1, 2 and 3, may provide means for supporting and guiding one or moreplates between the pressure member and the fixed cross member of thepress. Each platen 32 has side edges provided with one or more lugs 33,secured by a bolt 34 to the platen, the lug having a notched part 35engaging a locating pin 36 projecting from the platen. Bolted to thesides 26 of the stanchions 25 are the platen supports or stop pieces 31on which the lugs 33 rest to hold the several platens in the requiredspaced relationship when the ram is in its lowered position. Each stoppiece 31 is held in place by a bolt 43, and has a locating pin 50 toinsure its proper placement on the stanchion. It will be observed thatthe lugs on the several platens are alternated, as clearly seen in Fig.8, and each platen is guided in its vertical movement by the severallugs 33 operative Ialong the side flanges 26 of the stanchions or tiears.

With the arrangement illustrated, the head and/ or pressure applicatorof the press is securely held in place against repeated stress inoperation. The design is such that the replacement of a tie bar or across member is quickly and easily performed. For example, to replace astanchion in a vertical hydraulic press, the ram may be raised tosupport the head, or in a multiopening, all of the platens and the head,and the hydraulic valve, are then kept closed to retain the ram in itselevated position. Thereupon, the screws (Hi, IOb, 2| or 28) whichattach the stanchion to the head and base are removed, or, as in Fig. 6,simply loosened sufiiciently, and a new stanchion quickly fitted intoposition. Similarly, the head may be shifted by simply loosening thebolts if the stanchions are slotted or clamped, but removed if in holes,utilizing the hydraulic pressure or other simple means to position thehead at the new desired location, and then the bolts or screws 28 areinserted through proper holes (or merely tightened if elongated slots orclamps are used instead of the holes 29),

Numerous other advantages following from the several constructionsdescribed will be apparent to those skilled in the art, and therefore,while a number of embodiments have been described, the invention is notto be limited thereto but is broad enough to cover all structures com?ing within the scope of the annexed claims.

Whatlclaimis:

1. In a press of the character described, a press, cross head having itsopposite side faces provided with a plurality of angular teeth, each ofsaid teeth being provided with a substantially rectangular face, one ormore tie bars on each of the sides of the head, threaded means holdingthe tie bars and cross head together, each of said tie bars beingsubstantially U-shaped in cross section and having its cross webprovided with teeth in meshwith those on the cross head, each ofthe-teeth on the tie bars having a rectangularly disposed shouldertaking over a rectangular surface on a tooth on the" cross head, andmeans by which the setting of the cross head with respect to the toothedsurfaces of the tie bars may be adjusted.

2. In a press of the-"character described, a pair of tie bars, at leastone of said tie bars consisting of a channel-beam having a, face of itscrossweb provided near its opposite ends with a plurality of angularteeth, the teeth at on end each having a rectangularly disposedshoulder, the teeth at the opposite end each having a rectangularlydisposed surface, a cross head extending between the tie bars, saidcross head having a face provided with teeth to fit those at one end ofthe toothed tie bar, the teeth on the cross head each having arectangularly disposed surface to fit below one of the shoulders on theteeth in one of the groups of teeth on the tie bar, and a member opposedto the cross head having a, face pro- -vided with teeth adapted to fitthose in th sec-- ond group on the tie bar, the teeth on the memberopposed to the cross head being each provided with a shoulder forengagement over the rectangular surfaces of the teeth in the secondgroup The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,056,101 Howard Mar. 18, 19131,646,510 Weaver Oct. 25, 1927 2,062,043 Stacy Nov. 24, 1936 2,134,140Miller -1 Oct. 25, 1938 FOREIGN PATENTS Number Country Date 17,499British 1903 1,693 British 1903 456,721 British Nov. 11, 1936

